Piperaceae, Piper capensis
I took this photo of P. capensis in western Kenya, in the Kakamega forest. It is used locally as a remedy for sore throat. I happened to have a sore throat at the time which it helped to alleviate. The flower spike (pictured below in the foreground of the leaf) is chewed. It has a fresh, agreeable effect, with an almost minty or wintergreen flavor. The flower spike is chewed and the resulting saliva swallowed. After sufficient chewing the plant matter is spit out.